Dead Fish, why?!

[catfishkid]

I'm getting so tired of having to post these but my two mollies died. Yesterday I posted about my lyretail being upside down, well he died today. And after he was scooped out I noticed that my black molly was also dead. But she was wedged between the glass and the thermometer and looked like this:

Help.

 

[tangs27]

What are your water parameters?

 

[catfishkid]

pH - 6.2
ammonia - 0 ppm
nitrite - 0 ppm
nitrate - 3-4 ppm (hard to tell)

 

[Tommy10]

How big is the tank? Is it cycled? Where did u buy the fish?

 

[catfishkid]

The tank is 22 gal, fully cycles and has been for months. I get all my fish at Petsmart.

 

[tangs27]

When did you add the fish? What else is in the tank? Sometimes chain stores let their stock live in unsafe conditions which can shorten their life.

 

[catfishkid]

I got them May 5, also currently in the tank is:

1 Dwarf Gourami
4 (used to be 5) tiger barbs
1 sunburst platy
1 mickey mous platy
5 neon tetras
4 khuli loaches
1 (if its still there) bumblebee catfish

 

[tangs27]

Tiger barbs can be pretty rough. I have 4 and every once in awhile they have a fit and go after a tank mate. They are smaller than most of the other fish so they usually back off before they cause damage.

 

[catfishkid]

So it was them who may have attacked the black molly?

 

[tangs27]

It's possible all fish are different. Did you notice any marks on the fish when you pulled it out?

 

[catfishkid]

I'm not sure, in the pic she looked a bit torn up if thats what those patches are on her.

 

[tangs27]

It's hard to tell in the picture but it's very possible. Have you noticed any aggression?

 

[catfishkid]

Not at all, they've been very peaceful and they stay in their little school most of the time.

 

[tangs27]

Any issues with the gourami?

 

[catfishkid]

Nope, he's the hardiest fish I've ever had. He's been peaceful for the more than half a year I've had him and he always adjusts to new arrivals almost instantly.

 

[tangs27]

That's really good. If they were healthy from the store than it may have been the barbs.

 

[catfishkid]

Alright, thank you for you help!

 

[tangs27]

You're welcome

 

[Glene20]

If this was my I would do 50% water changes everyday for a week. Most likely you have some parasite in your tank.

Sent from my GT-I9505 using Aquarium Advice mobile app

 

[PatrickL]

I have 14 tiger barbs, and recently got 4 mollies(2 balloon and two normal) and the tiger barbs didn't even investigate them when I added them, which was weird. My two normal mollies both died within a week, abruptly with no warning, but my two balloon mollies are still going after a month. In my experience, when my tiger go so far as to kill something, I find it finless and without eyes(as I added tigers, some of the previous tigers got dethroned by the newer ones). I dont think it was tigers in your case, I think some mollies are just fragile or something.